Research and application of electronic nose and electronic tongue in food inspection

With the development of olfaction sensors and taste sensors, many researches and applications have been made in the electronic nose and electronic tongue. The electronic nose consists of an array of gas sensors with different selectivity patterns, signal processing and pattern recognition and decision strategy. The electronic tongue, which was developed for the taste analysis of liquids, is based on pulsed voltammetry. Measurement data from the artificial smell and taste sensors are used to produce sensor-specific opinion about these two human-like sensing modalities. This paper introduced the configuration and basic principle of electronic nose and tongue at the same time. The current research situation and applications of the electronic nose and electronic tongue in the food inspection were introduced in details. It is also given that the theoretical and technological problems which should be solved.